Cornet,
If your colleague is still undergoing conversion line training, then that probably explains a lot.
In most companies, the training captain will set out to overtrain in the company mould so that, at training's end, the student has an easier time of the final check to line and the company philosophies are more strongly reinforced.
The majority of training captains are chamaeleons in that they can swap hats quite easily from training to line captain. Perhaps you should revisit the discussion with your colleague after he/she has finished line training.